In off-shore and on-land Wind Power Generating Sets, they are smoothly rotating facing the natural wind, transforming its green nature energy into a continuous power. Inside those huge structures, there is an indispensable component-the Brush Holder-which likes the "nerve system" of the motor to silently ensure the motor operation with its stable safety and high efficiency.
When the motor is capturing the natural wind, its blade and rotor both need to continuously rotate, and its control system in the cabin remains static. In order to ensure its smooth transmission its power and control signal between the rotating and the static components, the motor is generally equipped with a Slip Ring system. And, the Brush Holder, as one of the core components in the Slip Ring system, plays an indispensable role in building a stable and reliable slide electric contact between the static and rotating parts through internal spring mechanism, which can keep the carbon brush that is pressured on the rotating conductive ring (slip ring) with a constant and appreciate pressure.
In the process of its complex operation of the motor, the brush holder is facing a series of harsh challenges. During the operation, the equipment will be generated a continuous mechanic vibration, and faced with an extreme environments such as in-land and off-shore temperatures as well as a changeable moisture difference. If the brush holder is not preciously designed, the carbon brush might be led to an unbalanced pressure, excessive wear and even an arc discharge, causing a systematic halt. Therefore, the modern brush holder is generally equipped with a constant spring mechanism and a compensatory pressure board. With such a precious mechanic design, the carbon brush can still obtain an automatic compensation and keep a perfect contact pressure when its length is shorter and shorter after a longer operation. Thanks to above-mentioned advantage, related excessive mechanic friction and its carbon-powder accumulation can both be reduced, effectively protecting the carbon brush against corresponding vibration in the brush holder for the purpose of large prolonging the service life of the carbon brush.
In order to maintain a stable contact pressure, the brush holder also acts as a smart motoring and a reliable safety guarantee. Inside lots of advanced brush holders, there is a wear sensor or micro-switch for the purpose of sending an early warning signal to its background control system. Thanks to such an early warning maintenance mechanism, the maintenance staff can repair and maintenance in advance, avoiding an accident halt generated by its exhaust of the carbon brush and an expensive maintenance cost. Furthermore, the brush holder is generally designed with an anti-corrosion material with excellent heat dispersion for the purpose of ensuring a stable operation condition under a harsh environment.
In conclusion, in spite of a micro component in the motor, the brush holder, through a precious mechanic structure and a smart design, can perfectly solve the puzzle of a dynamic electric conduction between the rotating and the static components. Thanks to such above-mentioned "silent backstage hero", the motor can be ensured a safe, stable and highly effective operation in its long period of more than a two-decade year to transform the natural wind into a green energy for thousands of households.
